[TS-532] possible misbehavior with HEAD request before GET

• Type: Bug
• Status: Closed
• Priority: Trivial
• Resolution: Invalid
• Fix Version/s: 2.1.6
• Component/s: HTTP

Environment

we have many haproxy before the TS server, do L7 hashing for all request

• Assignee: Unassigned
• Reporter: Zhao Yongming
• Created: 12/Nov/10 15:50
• Updated: 17/Dec/10 08:16
• Resolved: 17/Dec/10 08:16

Description

sometimes there is many HEAD request flood in, looks like cache in loop, but TS does not identify it as a loop.

as the HEAD request will all pass to OS, that will make OS unable to response for sometime? get 1-5k connections, make TS get throttling.

here is some tcpdum cap file

why I suspect HEAD request, is when I ban all HEAD request use quick filter mask, the connection rush is gone.

but this could be other problem indeed. just open this bug for logging.